Quick Transmigration: Give Every Supporting Character a Happy Ending

Looking for Novels About Becoming the Parents of Characters in TV Shows and Movies

I once saw a novel set across different film and TV worlds, where the protagonist transmigrates into an unreliable father or mother and raises the kids. For example, transmigrating into Qiao Zuwang from "The Bond" and raising the children, or into Taiwei from "Ashes of Love" to raise Runyu. Something like that, where an unreliable parent heals a child who had an unhappy childhood.